What is the molar ratio between oxygen and carbon dioxide, given the following equation? 2c4h10 + 13o2 right arrow 8co2 + 10h2o

2C4H10 + 13O2 > 8CO2 + 10H2O

Number of moles 13 mole of O2 : 8 mole of CO2

Molar ratio: n(O2) :n(CO2) = 13 : 8

n is a number of moles.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.